Life on Earth changed from consisting of only small, single-celled organisms to including large, multicellular organisms. Thus, option "D" is correct.
<h3>What are fossils traces?</h3>
A fossil expresses the traces or is the remains of a prehistoric plant or animal that has died and its body part has been carefully been imprinted onto the surface of the rock that is sedentary as they have the characteristics of the mineral preserving qualities.
Their age, method of formation and evolutionary significance can be well established by the fossil remain in rocks that depict their occurrence throughout the carbon dating of the rocks.
The process that leads to the formation of fossil is Personalization, casts and moulds, recrystallization and Carbonization. Tracing a fossil consists of digging out the track and burrows.
Some fossil is found in deposits of resins which completely preserve the fossils from the erosion process.
Thus, option "D" is correct.
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Answer:
Adrenal glands
Explanation:
The adrenal glands, which are part of the endocrine system are two triangular-shaped glands located at the top of each kidney. The gland comprises of an outer part known as the cortex, and an inner part known as the medulla.
The adrenal glands produce hormones which help to regulate essential functions of the body. One of the important functions of the adrenal gland is the production of hormones that work with the sympathetic nervous system to create a a fight or flight response during stress or when the body perceives a threat. Hormones such as adrenaline and cortisol is released into the blood stream, which increase heart rate and blood pressure, increase energy supplies, as well as put the body in a state that enables it to fight a threat or flee from it.
Answer: Oxygen Isotopes!
Explanation: I just took the quiz and I got it correct!